Measurement and Instrumentation The coil of a moving coil meter has 100 turns, is 40 mm long and 30 mm wide. The control torque is 240×10-6 N-m on full scale. If magnetic flux density is 1Wb/m2 range of meter is 4 mA. 2 mA. 1 mA. 3 mA. 4 mA. 2 mA. 1 mA. 3 mA. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The measurment of very low and very high frequencies is invariably done using a frequency counter in which one of the following? Period and frequency measurement modes respectively. Period measurment modes only. Frequency measurment modes only. Frequency and period measurment modes, respectively. Period and frequency measurement modes respectively. Period measurment modes only. Frequency measurment modes only. Frequency and period measurment modes, respectively. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation _______ instruments are those which measure the total quantity of the electricity delivered in a particular time. Recording Integrating Absolute Indicating Recording Integrating Absolute Indicating ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A 50 Hz bar primary CT has a secondary with 500 turns. The secondary supplies 5 A current into a purely resistive burden of 1Ω. The magnetizing ampere-turn is 200. The phase angle between the primary and secondary current is 4.6o. 85.4o. 175.4o. 94.6o. 4.6o. 85.4o. 175.4o. 94.6o. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The expected value of the voltage across a resistor is 80 V, and the measured value is 79 V. What is the percentage error and relative accuracy of the measurement ? 1.5% & 99% 1.25% & 98.75% 1.5% & 98.75% 1.25% & 98.25% 1.5% & 99% 1.25% & 98.75% 1.5% & 98.75% 1.25% & 98.25% ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation When testing a coil having a resistance of 10 ohms, resonance occurred when the oscillator frequency was 10 MHz and rotating capacitor was set at 500/2π pF. The effective value of the Q of the coil is 54.2. 20. 31.4. 25.4. 54.2. 20. 31.4. 25.4. ANSWER DOWNLOAD EXAMIANS APP
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